From: will.deacon@arm•com (Will Deacon)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 3/5] iommu/arm-smmu: Invalidate TLBs properly
Date: Mon, 7 Dec 2015 11:09:39 +0000 [thread overview]
Message-ID: <20151207110939.GB23430@arm.com> (raw)
In-Reply-To: <2acaea8656f14a4421d7d466dd242fe5a3d0f6f6.1449246988.git.robin.murphy@arm.com>
On Fri, Dec 04, 2015 at 05:53:00PM +0000, Robin Murphy wrote:
> When invalidating an IOVA range potentially spanning multiple pages,
> such as when removing an entire intermediate-level table, we currently
> only issue an invalidation for the first IOVA of that range. Since the
> architecture specifies that address-based TLB maintenance operations
> target a single entry, an SMMU could feasibly retain live entries for
> subsequent pages within that unmapped range, which is not good.
>
> Make sure we hit every possible entry by iterating over the whole range
> at the granularity provided by the pagetable implementation.
>
> Signed-off-by: Robin Murphy <robin.murphy@arm•com>
> ---
> drivers/iommu/arm-smmu.c | 19 ++++++++++++++++---
> 1 file changed, 16 insertions(+), 3 deletions(-)
Can you do something similar for arm-smmu-v3.c as well, please?
Will
next prev parent reply other threads:[~2015-12-07 11:09 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-04 17:52 [PATCH 0/5] io-pgtable fixes + ARM short-descriptor format Robin Murphy
2015-12-04 17:52 ` [PATCH 1/5] iommu/io-pgtable-arm: Avoid dereferencing bogus PTEs Robin Murphy
2015-12-13 21:41 ` Laurent Pinchart
2015-12-14 15:33 ` Robin Murphy
2015-12-04 17:52 ` [PATCH 2/5] iommu/io-pgtable: Indicate granule for TLB maintenance Robin Murphy
2015-12-07 11:08 ` Will Deacon
2015-12-07 12:09 ` Robin Murphy
2015-12-07 13:48 ` Will Deacon
2015-12-07 18:18 ` [PATCH v2] " Robin Murphy
2015-12-04 17:53 ` [PATCH 3/5] iommu/arm-smmu: Invalidate TLBs properly Robin Murphy
2015-12-07 11:09 ` Will Deacon [this message]
2015-12-07 13:09 ` Robin Murphy
2015-12-07 13:34 ` Will Deacon
2015-12-07 18:18 ` [PATCH v2] " Robin Murphy
2015-12-07 18:28 ` Will Deacon
2015-12-04 17:53 ` [PATCH 4/5] iommu/io-pgtable: Make io_pgtable_ops_to_pgtable() macro common Robin Murphy
2015-12-13 21:52 ` Laurent Pinchart
2015-12-04 17:53 ` [PATCH 5/5] iommu/io-pgtable: Add ARMv7 short descriptor support Robin Murphy
2015-12-08 8:58 ` Yong Wu
2015-12-17 20:12 ` Robin Murphy
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